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100995 (1998 QA40)
Classification: Main-belt Asteroid          SPK-ID: 2100995
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2459586154662537 3.3838e-08  
a 2.477055046379879 1.0093e-08 au
q 1.867802016738587 8.3675e-08 au
i 5.22171537720383 3.9193e-06 deg
node 164.1415311364134 5.0386e-05 deg
peri 168.8295655107106 5.2088e-05 deg
M 262.7209406827872 1.7313e-05 deg
tp 2459585.285568353601
(2022-Jan-05.78556835)
7.0287e-05 TDB
period 1423.973520915675
3.90
8.7033e-06
2.383e-08
d
yr
n .2528136897998671 1.5452e-09 deg/d
Q 3.086308076021171 1.2576e-08 au
  Orbit Determination Parameters
   # obs. used (total)      688  
   data-arc span      8219 days (22.50 yr)  
   first obs. used      1998-08-17  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56572  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:42  

Additional Information
 Earth MOID = .856096 au 
 Jupiter MOID = 2.29989 au 
 T_jup = 3.433 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.08   n/a E2021B55  
diameter diameter 4.176 km 0.973 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.042   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

100995 (1998 QA40)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 QA40 = 2002 PZ43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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